I have found them for the followin prices, conservative estimates, some have been lower at times:
1. Industrial Supply Company, Labled as Industrial Lithium AA. Box of 100: $100USD ($1ea)
2. Surplus merchandise stores (on and off-line) Various Brands Lithium AA Avergae Box of 100 Average Price:$300.00 ($3 ea)
3. Whole sale supplier/bulk sales dealers Lithium AA Box of 100 $200 ($2ea)